21011332102 has 4 divisors (see below), whose sum is σ = 31516998156. Its totient is φ = 10505666050.

The previous prime is 21011332081. The next prime is 21011332129. The reversal of 21011332102 is 20123311012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252833024 + ... + 5252833027.

It is an arithmetic number, because the mean of its divisors is an integer number (7879249539).

Almost surely, 2^21011332102 is an apocalyptic number.

21011332102 is a deficient number, since it is larger than the sum of its proper divisors (10505666054).

21011332102 is a wasteful number, since it uses less digits than its factorization.

21011332102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10505666053.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21011332102 its reverse (20123311012), we get a palindrome (41134643114).

The spelling of 21011332102 in words is "twenty-one billion, eleven million, three hundred thirty-two thousand, one hundred two".